[Xen-devel] [PATCH RFC 28/35] arm: acpi map acpi tables in dom0

[parth.dixit@xxxxxxxxxx]

From: Parth Dixit <parth.dixit@xxxxxxxxxx>

map acpi tables described in uefi table to dom0 address space

Signed-off-by: Parth Dixit <parth.dixit@xxxxxxxxxx>
---
 xen/arch/arm/arm64/acpi/arm-core.c | 43 ++++++++++++++++++++++++++++++++++++++
 xen/arch/arm/domain_build.c        |  4 ++++
 xen/include/asm-arm/acpi.h         |  1 +
 3 files changed, 48 insertions(+)

diff --git a/xen/arch/arm/arm64/acpi/arm-core.c 
b/xen/arch/arm/arm64/acpi/arm-core.c
index cc11fce..6707e4c 100644
--- a/xen/arch/arm/arm64/acpi/arm-core.c
+++ b/xen/arch/arm/arm64/acpi/arm-core.c
@@ -31,6 +31,7 @@
 
 #include <asm/cputype.h>
 #include <asm/acpi.h>
+#include <asm/p2m.h>
 
 /*
  * We never plan to use RSDT on arm/arm64 as its deprecated in spec but this
@@ -241,6 +242,48 @@ static int __init acpi_parse_fadt(struct acpi_table_header 
*table)
        return 0;
 }
 
+int acpi_map_tables(struct domain *d)
+{
+    int i,res;
+    u64 addr, size;
+
+    /* map rsdp table */
+    addr = acpi_os_get_root_pointer();
+    size = sizeof(struct acpi_table_rsdp);
+
+    res = map_ram_regions(d,
+                            paddr_to_pfn(addr & PAGE_MASK),
+                            DIV_ROUND_UP(size, PAGE_SIZE),
+                            paddr_to_pfn(addr & PAGE_MASK));
+    if ( res )
+    {
+         printk(XENLOG_ERR "Unable to map 0x%"PRIx64
+                " - 0x%"PRIx64" in domain \n",
+                addr & PAGE_MASK, PAGE_ALIGN(addr + size) - 1);
+         return res;
+    }
+
+    for( i = 0; i < acpi_gbl_root_table_list.count; i++ )
+    {
+        addr = acpi_gbl_root_table_list.tables[i].address;
+        size = acpi_gbl_root_table_list.tables[i].length;
+
+        res = map_ram_regions(d,
+                            paddr_to_pfn(addr & PAGE_MASK),
+                            DIV_ROUND_UP(size, PAGE_SIZE),
+                            paddr_to_pfn(addr & PAGE_MASK));
+        if ( res )
+        {
+             printk(XENLOG_ERR "Unable to map 0x%"PRIx64
+                    " - 0x%"PRIx64" in domain \n",
+                    addr & PAGE_MASK, PAGE_ALIGN(addr + size) - 1);
+             return res;
+        }
+    }
+
+    return 0;
+}
+
 /*
  * acpi_boot_table_init() called from setup_arch(), always.
  *      1. find RSDP and get its address, and then find XSDT
diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 49eb52a..a504064 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -1278,6 +1278,10 @@ static int map_acpi_regions(struct domain *d)
 {
     int res;
 
+    res = acpi_map_tables(d);
+    if ( res )
+        return res;
+
     res = acpi_map_mmio(d);
     if ( res )
         return res;
diff --git a/xen/include/asm-arm/acpi.h b/xen/include/asm-arm/acpi.h
index 01ce28d..4f52cd6 100644
--- a/xen/include/asm-arm/acpi.h
+++ b/xen/include/asm-arm/acpi.h
@@ -108,5 +108,6 @@ static inline void acpi_disable_pci(void)
 #define MAX_GIC_CPU_INTERFACE 65535
 #define MAX_GIC_DISTRIBUTOR   1                /* should be the same as 
MAX_GIC_NR */
 extern int __init acpi_gic_init(void);
+int acpi_map_tables(struct domain *d);
 
 #endif /*_ASM_ARM_ACPI_H*/
-- 
1.9.1


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